Water heater



T. D; PLLCHER.

WATER HEATER.

APPL|-CAT|0N FILED SEPT. 11. 1918.

Patented Dec; 12, 18223.

WITNESS:

Patented Dec. 12,1922.

Fl I

WATER HEATER.

Application filed September 11,1918. SerialNo. 253,551.

To all whom-it may concern: v

Be it known that I, THOMAS D. PILCHER, a citizen of theUnited States, residing at Washington, in, the District of Columbia, have invented certain new and useful Improvements in Water Heaters, of which the following is a specification.

The invention relates to water heaters, the object thereof being in general to utilize units of heat which hitherto have been carried away with products of combustion and wasted. l

Referring to the drawmg- Figure 1' represents a partial vertical section of a water heater provided with my improvements. v

v Figure 2 represents a similar view'of a modification.

In Fig. 1, 1 re resents a smoke flue openv at its lower en' 2 for the reception of products of combustion from any suitable source, such as a gas stove or a wood or coal burning stove or furnace, and open at its upper end 3 for the discharge of the products of combustion. The smoke flue as shown is provided with a plurality of enlargements 4 of double truncated conlcal form, although in some instances onlya single enlargement may be required.

The smoke flue is surrounded by a jacket 5 conforming to the shape of the smoke flue and'its enlargements, there being a space water.

i during which the water may become highly heated by the utilization of heat units taken between the smoke flue and the acket for throughout the successive portions of its length, so that the water in passing each of the enlargements flows with varying velocities. Water passing the first half of one of the enlar ements is dec'elerated'in its flow, but the flow is accelerated as said water passes the second half of said enlargements. There is therefore a period of retardation from the products of combustion flowing through the interior of the enlargement. The transfer of heat units is further aided by'the eddying and detention of the smoke and the products of combustion within the enlargement. The products of combustion,

therefore, escape from the upper end; (if;

Water is supplied to this space the smoke flue deprived of a very large portion of their heat.

Thefconstruction shown in Fig. 2 comprises an addition to the water jacket and the smoke flue revealed in- Fig. 1, an outside smoke flue 5 which is in communication with the same source of products of combustion as the smoke flue l of Fig. 1. The central smokeflue 1 in this modification is somewhat larger in diameter than the smoke flue 1 of Fig. 1, and is provided with a closed core 12 spaced from and. conforming to the shape of the flue l The object of this core is to compel the products of combustion to flow into intimate relation to the wall of the smoke flue 1 so as to heat said Wall to the reatest possible extent. The

inlet 6 and t e outlet 7 for water are the same as those shown in Fi 1. The device is provided with an outlet ue 13 for receiving and carrying away products of combustion flowing through the spaces on either side of the water chamber of the device.

tion flowin through the device are retarded and cause .to eddy, whereby a maximum transfer of heat units to the water within the water heater may be effected. The. de-

,vice may be attached to any kind of heater,

or it may simply be placed upon an ordinary cooking stove or gas range and reucts of combustion, and a jacket for sai flue. 'havin an inlet and an outlet for water, said ue and said jacket being each pro- :vided .with a water-deflecting enlargement of double truncated conical formation. 2. A water heater comprisin an inner. SmOkB fiHQ' having an mletan an outlet ceive heat therefrom in the same manner as an ordinary cooking utensil or tea kettle.

for the 1)](111111'2118 o1 conllmstion and an enlargeinent. an outer smoke flue having an enlargelnenh and a receptacle for water hetwecn the inner and outer lines the walls of which correspond with the enlargements in the two lines.

A water heater comprising" a smoke line having an inlet and an outlet for products of combustion. a jacket for said flue having an inlet and an outlet for water, and a core spaced from and within said flue. said line, said jacket and said core having corres o11d ing water-1lcflecting enlargements.

=1. 1\ water heater colllplisillg' a smoke flue havingan inlet and an outlet for products of combustion, a jacket for said flue having a 11 in let a 11d an outlet for Water, a core spaced from and within said flue, and 'a smoke flue spaced from and surrounding'said jacket.

5. water heater comprising a smoke flue having an inlet and an outlet for products of combustion, a. jacket for said flue havinglan inlet and an outlet for Water, a core spaced from and within said fine, and a smoke flue spaced from and surrounding said jacket; said elements all being provided with correspondingdeflecting enlargements. In testimony whereof I affix my signature.

213110111115; 1). PiLoHER. 

